Needle mounting for hypodermic syringes



April l2, 1927.

Bl. FRIEDMAN NEEDLE MOUNTING FOR HYPODERMIC SYRINGES INVENTOR:

Filed May 8, 1926 BENJAM//v FR/EDMA/v BY l ' ATTORNEY.

Patented Apr. 12, 1927.

UNITED STATES 1,624,327 PATENT OFFICE.

BENJAMIN FRIEDMAN, OF NEW YORK. N. Y.

NEEDLE L/IGUNIING FOR HYPQDER'IYIIG SYRINGES.

Application filed. May S,

This invention relates to needle niountings and attachments for hypoderinic syringes and the like. being particularly adapted to that type of syringe wherein the seal or closure of a capsule or cartridge may be pierced simultaneously with the positioning of the needle.

One of the ob 'ects of my invention is to provide a nove". and improved leak proof mounting for hypodermic needles capable of attachment to the barrels of various types of hypodermic syringes.

A further object of my invention is to provide a hypodermic needle and mounting or union therefor which may be easily attached to the barrel of a. conventional type of hypoderniic syringe and wherein the injecting fluid may pass directly through the needle and does not come into Contact with any portion of the syringe or the needle mounting, thus producing a leakproof and sterile instrument.

Another object of my invention is to provide a hypodermic needle and mounting therefor.` adapted for use and connection with the barrel of a hypodermic syringe, in which washers and other leak preventatives are avoided and in which the only portion of the syringe which requires sterilization is the needle itself.

To enable others skilled in the art to fully comprehend the underlying features of my invention that they may embody the same in the various modications in structure and relation contemplated, drawings depicting a preferred form have been annexed as a part of this disclosure and in such drawings, similar reference characters denote corresponding parts throughout the several views, ofA which- Fig. 1 is an elevation of al portion of a syringe barrel showing the needle and needle mounting.

Fig. 2 is an elevation of the needle.

Fig. 3 is an elevation showing the cap or ferrule for the barrel.

Fig. 4 is a sectional view showing the needle and needle mounting in one form of the invention.

Fig. 5 is an elevation of a modified form of the invention.

Fig. 6 is a sectional view showing a needle mounting of the modified form of the invention disclosedby Fig. 5.

Fig. 7 is a still further modifiedform of syringe barrel and needle mounting.

1326. serial No. 107,811.

Fig. 8 is a sectional view of the modified form of the invention shown by F ig. 7.

Referring now to the drawings wherein like reference characters designate corresponding parts throughout the several views, in Figs. 1 to 4 thereof, 5 designates a syringe barrel which is adapted to receive therein a fragile capsule or cartridge 6 containing the liquid or fuel to be injected, said capsule or cartridge having a seal or closure 7 which may be rubber or cork. The end of the barrel is rsmooth being provided with a few threads as indicated by numeral 8 to receive the end, threaded portion 9 of a ferrule or cap 10. The interior of the ferrule or cap being also smooth may thus fit and slide over the end of the barrel and locked thereto by means of a few threads, and constitutes an abutment for the seal of the capsule or cartridge within the barrel proper.

The ferrule or cap is formed with a socket portion 11 having a concave seat 12 there-in with an aperture 13 for the passage of the needle 14. A needle nozzle 15 for the said needle 14 is provided with a .convex eX- tension 16 fitting within the concave seat 12 and is threaded as at 17 to engage the threads 18 in the upper portion of the seat above referred to. The ferrule is preferably knurled as indicated by numeral 19 and the needle nozzle is similarly knurled as at 20 to facilitate the threading of the parts on to the barrel. It will be observed also that the needle is adapted to pass through the aperture 13 being of a length to penetrate the seal or closure 7 before the nozzle is threaded to the ferrule.

In the modified form of the invention shown by Figs. 5 and 6, the barrel 21 is provided with a nipple 22 threaded as at 23 and formed with a concave seat 24. Connected to the nipple is a union or nozzle attachment 25 provided with an internally threaded socket 26 which interfits therewith,

there being a continuous, aligned passage through the said nipple and union or nozzle for the needle 27. In this form of the invention, the needle is further provided with a sleeve 28 which extends to the seat 24 thus making a leak-proof joint at this portion of the instrument. The needle nozzle 29 and its socket 30 interts with the union or nozzle attachment, beingconnected thereto by a few threads as at 31.

In Figs. 7 and 8 I have shown a syringe barrel32. similar in construction to the bar rel described in connection with Fig at but instead of a cap or ferrule, the barrel is provided with a threaded nipple 33, having a concave seat 34. A union or nozzle mounting 35 formed with an. internally threaded socket 36 is connected with the threaded nipple, it being observed that there is a central passage through the said nipple andv union or nozzle for the needle 37 carried by the needle nozzle 88. In this form of the invention, the needle extends entirely through the nipple and is of a length to pierce the closure of the cartridge or container within the/barrel. The needle nozzle 38 within the socket 39 ormedinlthe top ol the union-is of reduced diameter so as to snugly lit therein being provided with a few threads for connection with the threads lil; Inthis form of the invention, well as the `form shown by F 5 and 6,1 the union with the nozzle may be removed or replaced as an entirety from the nipple of the barrel, the union permitting a needle of the type shown byFig. G-or that shown by Fig. 8 to4 beuscd.

From thev` above construction, it will be seen that according to my attachment, the replacement of the barrel ofV a hypoderrn'ic syringe seldom il" ever becomes necessary. Then once purchased, the unioni and the needle nozzle' constitute attachments which can be had at a small expense.l It is well known that needle replacements constitute the major expense in hypodermic syringes and by providing a union of the character and type shown which interlit's and cooperates with the needle nozzle, a lea'hprool syringe is provided.

This application is an improvement over my co-pending application tor syringes, filed July 21, 1925', Serial No. 45,015', allowed April 17, 1926.

Having` shown andv described my invention, what I now claim as new and des-ire to secure by' Letters Patent ol" the U. S. is:

l.. A: needle mounting for hypodermic syringe barrels comprising a cap detachably connected to the discharge end of said barrel, said cap having a socket and a concave seat therein, needle" nozzle and a needle detachably connected within the tapered seat o the socket of the cap, said needle extending4 through the nozzle and cap and into the end of the barrel.

2. A needle mounting for hypodermic syringe barrels comprising a cap threaded to the discharge end of said barrel, said cap having a socket and a concave seat therein, and a needle nozzle and needle threaded within the tapered seat of the socket ol the cap, said needle extending through the nozzle, cap and end of the barrel.

8. A needle mounting :tor hypoderi'nic syringe barrels comprising a cap-threaded to the outer discharge endoi said barrel, said cap having a socket and a concave seat there in, a needle nozzle and needle threaded within the socket, said nozzle having a convex extension adapted to lie Within said seat forming a leakprool connection.

4. A needle mounting for hvpodcrmic syringe barrels comprising a cap having an interior non-threaded surface and a threaded portion whereby it may be slipped onthe discharge end of a syringe barrel and threaded thereto, said cap-having a concave seat in the topl thereof, a needle nozzle and a needle detachably seated Within and threadedA in the concave seat, said need-le be ing` adapted to extend through the nozzle, cap and discharge end of the barrel and said cap and nozzle being detachable as a unit from the discharge end ci said barrel.-

5. A needle mounting for livnodermic syringe: barrels comprising a cap having an iinterior non-threadedsurtace and a threaded portion at its endonly whereby it may be slipped on the discharge end of a syringe barrel and threaded -thereto,\said cap having a parti-ally threaded concave seatA in its top, a needle nozzle and a need'le detachably seated within and threaded in theV concave seat, saidneedle being ola length` to extend through'the nozzle, capV and a closure in the discharge end of said barrel, said cap and nozzle being detachablel with the needle as a unitfrom said discharge end for sterilization.

In testimony whereof I allier my signature BENJAMIN FRIEDMAN. 

